Descarga Exámenes de Bachillerato Internacional Matemáticas Nivel Medio Prueba 2 TZ2 Mayo 2015.
Clases particulares de Matemáticas y Física IB.
Matemáticas Análisis y Enfoques NM Matemáticas Aplicaciones e Interpretación NM.
Exámenes de Bachillerato Internacional (BI).
Matemáticas Análisis y Enfoques NS Matemáticas Aplicaciones e Interpretación NS.
2. C
L
A
S
E
S
D
E
M
A
T
E
M
Á
T
I
C
A
S
Y
F
Í
S
I
C
A
B
A
C
H
I
L
L
E
R
A
T
O
I
N
T
E
R
N
A
C
I
O
N
A
L
W
H
A
T
S
A
P
P
+
5
1
9
7
6
4
3
8
4
8
2
W
W
W
.
T
E
O
T
E
V
E
S
.
C
O
M
– 2 –
Full marks are not necessarily awarded for a correct answer with no working. Answers must be
supported by working and/or explanations. In particular, solutions found from a graphic display
calculator should be supported by suitable working, for example if graphs are used to find a solution,
you should sketch these as part of your answer. Where an answer is incorrect, some marks may be
given for a correct method, provided this is shown by written working. You are therefore advised to show
all working.
Section A
Answer all questions in the boxes provided. Working may be continued below the lines if necessary.
1. [Maximum mark: 6]
The following diagram shows triangle ABC.
diagram not to scale
35
A
B
C
10
80
BC cm
=10 , ˆ
ABC 80
=
and ˆ
BAC 35
=
.
(a) Find AC. [3]
(b) Find the area of triangle ABC. [3]
(This question continues on the following page)
12EP02
m15/5/MATME/SP2/eng/TZ2/XX
Clases de Matemáticas y Física para Bachillerato Internacional
WhatsApp +51976438482 www.teoteves.com
WhatsApp +51976438482 www.teoteves.com
10. C
L
A
S
E
S
D
E
M
A
T
E
M
Á
T
I
C
A
S
Y
F
Í
S
I
C
A
B
A
C
H
I
L
L
E
R
A
T
O
I
N
T
E
R
N
A
C
I
O
N
A
L
W
H
A
T
S
A
P
P
+
5
1
9
7
6
4
3
8
4
8
2
W
W
W
.
T
E
O
T
E
V
E
S
.
C
O
M
– 10 –
Do not write solutions on this page.
Section B
Answer all questions in the answer booklet provided. Please start each question on a new page.
8. [Maximum mark: 13]
Let f x
x
( ) =
+
9
2
and g x x
( ) = 3 2
, for x ≥ 0 . Parts of the graphs of f and g are shown in
the following diagram.
y
x
0
P
g
f
The graphs of f and g intersect at the point P( , )
p q .
(a) Find the value of p and of q. [3]
(b) Write down ′
f p
( ) . [2]
Let L be the normal to the graph of f at P.
(c) (i) Find the equation of L, giving your answer in the form y ax b
= + .
(ii) Write down the y-intercept of L. [5]
(d) Let R be the region enclosed by the y-axis, the graph of g and the line L.
Find the area of R. [3]
12EP10
m15/5/MATME/SP2/eng/TZ2/XX
Clases de Matemáticas y Física para Bachillerato Internacional
WhatsApp +51976438482 www.teoteves.com
WhatsApp +51976438482 www.teoteves.com
11. C
L
A
S
E
S
D
E
M
A
T
E
M
Á
T
I
C
A
S
Y
F
Í
S
I
C
A
B
A
C
H
I
L
L
E
R
A
T
O
I
N
T
E
R
N
A
C
I
O
N
A
L
W
H
A
T
S
A
P
P
+
5
1
9
7
6
4
3
8
4
8
2
W
W
W
.
T
E
O
T
E
V
E
S
.
C
O
M
– 11 –
Turn over
Do not write solutions on this page.
9. [Maximum mark: 16]
A machine manufactures a large number of nails. The length, L mm, of a nail is normally
distributed, where L N 50 2
, σ
( ).
(a) Find P( )
50 50 2
− < < +
σ σ
L . [3]
(b) The probability that the length of a nail is less than 53.92mm is 0.975.
Show that σ = 2 00
. (correct to three significant figures). [2]
All nails with length at least t mm are classified as large nails.
(c) A nail is chosen at random. The probability that it is a large nail is 0.75.
Find the value of t. [3]
(d) (i) A nail is chosen at random from the large nails. Find the probability that the
length of this nail is less than 50.1mm.
(ii) Ten nails are chosen at random from the large nails. Find the probability that
at least two nails have a length that is less than 50.1mm. [8]
12EP11
m15/5/MATME/SP2/eng/TZ2/XX
Clases de Matemáticas y Física para Bachillerato Internacional
WhatsApp +51976438482 www.teoteves.com
WhatsApp +51976438482 www.teoteves.com
12. C
L
A
S
E
S
D
E
M
A
T
E
M
Á
T
I
C
A
S
Y
F
Í
S
I
C
A
B
A
C
H
I
L
L
E
R
A
T
O
I
N
T
E
R
N
A
C
I
O
N
A
L
W
H
A
T
S
A
P
P
+
5
1
9
7
6
4
3
8
4
8
2
W
W
W
.
T
E
O
T
E
V
E
S
.
C
O
M
– 12 –
Do not write solutions on this page.
10. [Maximum mark: 16]
The following diagram shows a square ABCD, and a sector OAB of a circle centre O,
radius r. Part of the square is shaded and labelled R.
D
C
A
B
O R
θ
r
ˆ
AOB θ
= , where 0.5 θ
≤ < π.
(a) Show that the area of the square ABCD is 2 1
2
r ( cos )
− θ . [4]
(b) When θ α
= , the area of the square ABCD is equal to the area of the sector OAB .
(i) Write down the area of the sector when θ α
= .
(ii) Hence find α . [4]
(c) When θ β
= , the area of R is more than twice the area of the sector.
Find all possible values of β . [8]
12EP12
m15/5/MATME/SP2/eng/TZ2/XX
Clases de Matemáticas y Física para Bachillerato Internacional
WhatsApp +51976438482 www.teoteves.com
WhatsApp +51976438482 www.teoteves.com